Shuttle box control mechanism for looms



June 27,1933. A. O. DUMAS 1,915,271

SHUTTLE BOX CONTROL MECHANISM FOR LOOMS Filui Sept. 19, 1950 2 Sheets-Sheet 1 z7 .Q' I? a :2 a my 4 zj/ a, 41

4f i/ fl' 43 .4 2; J )1 1x 11 Java 9 an 6 o 7 June 27, 1933. A. o. DUMAS I 1 SHUTTLE BOX CONTROL MECHANISM FOR LOOMS Filed Sept. 19, 1950 2 Sheets-Sheet 2 f f f" t? K vp jig T.f ,4?

Patented June 27, 1933 'UNHTED STATES PATENT orrics ALBERT O. DUMAS, OF FISHERVILLE, MASSACHUSETTS SHUTTLE BOX CONTROL MECHANISM FOE LOOMS Application filed September 19, 1930. Serial No. 483,646.

from the Jacquard mechanism and obviously any such arrangement has required that each separate card of the Jacquard mechanism be provided with means for indicating the shuttle box to be employed in connection with with respect to the box motion, otherwise the pattern will be spoiled. For example, when employing a thousand or more cards for the Jacquard mechanism, the failure of one or more of said cards to properly indicate the drop boxes is necessarily followed by disastrous results.

According to the present invention there is provided an improved control mechanism for the box motion of a Jacquard loom that is characterized by control of the box motion more or less independently of the jacquard mechanism. Specifically, the invention provides a pattern chain, or similar device, for positively controlling the box motion, the

5 jacquard mechanism functioning only to initiate operate of the pattern device, upon the indication of a filling change in the jacquard pattern. In other words, only a very small percentage of the cards of the jacquard pattern are depended upon to control the box motion, the actual shifting of the boxes being accomplished by my improved pattern control mechanism. The above and other advantageous features of the invention will hereinafter more fully appear from the tol lowing description, with reference to the accompanying drawings, in which- Fig. 1 is a view in side elevation of a drop box loom provided with a control mechanism 0 embodying my invention.

that particular' card. In View of the com- Fig. 2 is a plan view showing the control mechanism on an enlarged scale.

Fig. 3 is a vertical sectional view along the line 33 of Fig. 2, looking in the direction of the arrows;

Fig. 4 is a sectional view alongthe line 44 of Fig. 2 showing the parts in a different position.

Fig. 5' is a fragmentary sectional view along the line 55 of Fig. 2, looking in the direction of the arrows.

Fig. 6 is a fragmentary view, in side elevation, showing the box pattern chain on an enlarged scale.

Fig. 7 is a plan view of the parts showninFig. 6.

Like reference characters refer'to like parts throughout the drawings.

Referring first to Fig. 1, a loom side is indicated at 1, the loom providing a plurality of shuttle boxes 2, 2 mounted on a litter rod 3. For purposes of illustration, the box motion is shown, as being of a well known type comprising a floating lever 4 connected boxes 2.

In the operation of a loox motion of the above described type, which forms no part of the present invention per se, raising or lowering of any one of the gears 10 with its arm 11 will bring the gear 10 into engage ment with one or the other of the mutilated cylinder or driving gears 13 and 14- disposed above and below the vibrator gears 10. Such engagement of a vibrating gear 10 will result in a rotative movement being imparted thereto in one direction or the other,therelink 9 and bell crank 6 or 7, which motion is transmitted to the drop box rod 3 and boxes 2.

As previously pointed out, the present invention contemplates the control of the box by changing the position of its associated motion through a separate pattern device functioning independently of the jacquard mechanism, and my improved mechanism is mounted on the loom side above the drop box motion just described. The control mecha nism consists of a number of indicating levers corresponding in number to the vibrator gears 10, each lever 15 being connected by a link 16 to the free end of one of the arms 11 carrying a vibrator gear 10. As best shown in Fig. 2, the indicating levers 15 are pivotally mounted in side-by-side relation on a shaft 17 supported by a bracket 18 extending upwardly from the loom side 1. The several levers 15 are capable of pivotal movement independently of each other, and pivotal movement of the levers 15 is controlled by a pattern chain generally designated by the reference character 19. As best shown in Figs. 6 and 7, the pattern chain 19 consists of-a number of rolls 20 mounted on pins 21 connected at their ends by links 22, the whole chain being mounted to turn on a shaft 23 freely supported in brackets 23a carried by the loom side 1. The. shaft carries a pair of spaced disks 24 providing notches 24a in which the pins 21 are seated adjacent to the links so that rotative movement of the shaft 23 is imparted to the whole chain 19.

As best shown in Fig. 1,the several levers 15 are adapted to bear on the rolls 2O ofthe pattern, chain 19, the rolls 20 being arranged in the order of the pattern for the box control as. indicated in Fig. 7 with spacers 20a between the rolls 20. In order to insure that the pattern chain shaft 23 will always be positioned with a roll 20 in engagement with a curved shoe 15a on one of the levers'15, the shaft 23 carries a positioning disk 25 having a number of seats 26' formed in the periphery thereof equal to the number of pins 21 of the pattern chain 19, see Fig.5. The seats 26 of the disk 25 are adapted to be engaged by a roll 27 rotatably mounted at the end of an arm 28 freely turnable on the shaft 17 which supports the levers 15. A projection 29 extends rearwardly from the hub portion 28a of the arm 28 and a spring 30 anchored at one end with its other end connected to the lug 29 serves to press theroll 27 into engagement with one of the seats 26 of the disk 25. Therefore, when the shaft 23 is given a rotative movement by mechanism which will next be described, it will always tend to come to rest in any one of a number of definite angular positions in which one of the pattern rolls 20' will bein engagement with a shoe 15a on one of the several box control levers 15. r

As best shown in Figs. 3 and 4, the pattern chain shaft 23 also carries fast thereon a pair of ratchet wheels 31 and 32, with the teeth 31a of the wheel 31 facing in the opposite direction with respect to the teeth 32a of the wheel 32. It will also be noted that the number of teeth 31a and 32a respectively, correspond to the number of series-of pattern rolls 20 mounted on the pins 21. The teeth 31a and 32a of the ratchet wheels are adapted to be engaged by a pair of oppositely facing pawls 33 and 34 respectively, the pawls being formed on a yoke 35 which embraces the shaft 23 and is pivotally mounted on a pin 36 carried at the end of an arm 37. As clearly shown in Fig. 2, the arms of the yoke 35 are displaced so as to locate the pawls 33 and 34 in planes corresponding toth-e planes of the ratchet wheels 31 and 32 respectively. The arm 37 to which the yoke 35 is .connected forms part of a sleeve 38 rotatably mounted on ashaft 39 projecting from the loom side 1. end of the sleeve 38 provides an arm 40 turnable in unison with the arm 37 and the free end of. the arm 40 provides a slot 41 for receiving a pin 42 carried at the end of a rod 43, see Fig. 1. The rod 43 terminates in a fork 44 which carries a cam roll 45 received in a groove 46a provided by a cam disk 46 mounted on the driving shaft 47 of theloom. With the above described connections between the yoke 35 and the 100111 shaft 47 it will. be obvious that each complete revolu tion of the shaft 47 will impart an oscillatory movement to the yoke 35.

As best shown in Fig. 3, the pawl yoke 35 is pivotally connected at its lower side to a link 48 by means of a pin 49 and the lower end of the link 48 carries a collar 50 providing an opening 50a for receiving a crank pin 51 projecting from the side of a gear 52. The gear 52 is in mesh with a gear 53 mounted on the loom shaft 47 and the ratio between the gears 52 and 53 is such that the gear 52 will make one-half of a revolution for each complete revolution of the loom shaft 47. Assuming that the parts occupy the position shown in Fig. 3, it is evident that when the yoke 35 is moved in the direction of the arrow by the operation of the cam roll 45, the crank pin 51 in connection with the link 48 is, in such a position as to cause the pawl 33 to engage one of the teeth 31a. Therefore, the pattern chain shaft 23 willbe turned through an angle equal to the pitch of one tooth 310. during one revolution of the loom shaft 47 Upon the next revolution of the loom shaft 47 the crank pin 51 willswing through the lower half of a revolution, thereby moving the pawl yoke 35 to the position of Fig. 4 whereupon the upper pawl 34 will engage one of the teeth 32a of the ratchet wheel 32. Therefore, the pattern shaft will be turned in the reverse direction, as compared to Fig. 3, and through the same angle. With the above described operation of the parts, continued revolution of the loom shaft 47 will result inthe pattern chain shaft 23 being given an oscillatory movement first in one directionand'then in The other upwardly, upon a filling) the other, of equal degree, so that whatever lever is in engagement with a roll will be moved up and down. This up and down movement of the lever will be imparted by the corresponding link 16 to one of the vibratory gears 10 and thereby cause a shuttle box 2 to be moved into operative position. Obviously this movement would continue in definitely in the absence of any other instrumentalities affecting the operation of the pawl yoke 35.

However, as previously pointed out, the invention contemplates the bringing about of a box change by the pattern chain 19 upon indication of a filling change by a card of the jacquard pattern, and this operation will now be described. As best shown in Fig. 1, the upper side of the pawl yoke has connected thereto a link 54 which extends upwardly to the jacquard pattern mechanism, not shown in detail, it being suflicient to state that the link 54 is connected to a lifter wire 55 of the jacquard mechanism so that upon the indication of a filling change in the jacquard pattern, a lifter bar 56 will lift the wire 55. Assuming that the link 54 is moved change indication, the entire yoke 35 will e turned upwardly about its pivot 36 so as to render the upper pawl 34 entirely inoperative. This movement is permitted by making a portion 48a of the link 48 telescopic within the body portion of the link, as indicated in dotted lines in Fig. 4. Therefore, since the lower pawl 33 is held in continuous engagement with the teeth 31a. during a complete revolution of the loom shaft, three successive turning movements will be imparted to the pattern chain shaft 23 through the ratchet wheel 31. This has the eifect of shifting the whole pat tern chain 19 with respect to the levers 15,and due to the arrangement of the rolls 20, an other lever 15 will be operated to raise its vibrator gear 10 and thereby bring another shuttle box 2 into operation. Following a filling change indication by a single card of the jacquard pattern mechanism, the; link 54 will release the yoke 35 and the previous operation of the box pattern mechanism will be resumed, characterized by continued oscillatory movement of the shaft 23 until another filling change is indicated. Thus, if the pattern calls for one hundred, or more, successive picks of the same filling, the jacquard mechanism will have no effect whatsoever on the box pattern, during those picks, and the pattern shaft 23 will oscillate back and forth, equally, to always operate the same lever 15.

In this manner the pattern causes a pair of boxes to be alternately placed in operative position so that a pair of threads may be i alternately woven into the material until a completed pattern is formed, at which time, in response to the jacquard mechanism, a

change of pattern is indicated and another lever is actuated to bring another pair of boxes into operation for the weaving of another pair of threads.

I claim, I I p 1. In shuttle box control mechanism for looms, the combination with a drop box controlling and operating mechanism comprising vibrator gears and levers and a plurality of pivoted armsdirectly connected to said levers for individually operating said levers, of a pattern chain device for selectively controlling movement of said box motion levers through direct movement of said arms, and means for turning said pattern chain device through a predetermined angle upon each pick of the loom.

2. In a shuttle box control mechanism for looms, the combination with a drop box controlling and operating mechanism comprising vibrator gears and levers, pivotally mounted members connected separately to said box control levers and a jacquard mechanism, of a pattern chain for controlling movement of said box lever actuating members, means for imparting an oscillatory movement of said pattern chain to cause the operation of a selected box lever, and means responsive to the indication of a filling change in the jacquard mechanism for advancing said pattern chain and thereby bring about i the operation of a different box lever.

3. In a shuttle box control mechanism for looms, the combination with a drop box controlling and operating mechanism comprising vibrator gears and levers, pivotally. mounted members connected separately to said box control levers and a jacquard mech anism, of a pattern chain for controlling the movement of said box lever actuating members, means for imparting rotative movement in opposite directions to said pattern chain upon successive picks of the loom, and means responsive to the indication of a filling change in said jacquard mechanism to automatically cause the rotative movement of said chain in the same direction upon successive picks of the loom and thereby cause the operation of a different box lever.

4. In a shuttle box control mechanism for looms, the combination with a drop box controlling and operating mechanism comprising vibrator gears and levers, pivotally mounted members connected separately to said'box control levers and a acquard mechanism, of a pattern chain for controlling the movement of said box lever actuating members, means for imparting rotative movement in opposite directions to said pattern chain upon successive picks of the loom, and means responsive to the indication of a filling change in said jacquard mechanism to automatically cause the rotative movementof said chain in the same direction upon successive picks of the loom and thereby cause the operation of a difierent box lever, said pattern chain resuming its operation independently of said jacquard mechanism following the indication of a filling change.

v 5. In a shuttle box control mechanism for looms, the combination with a drop box con trolling and operating mechanism comprising vibrator gears and levers, pivotally mounted members connected separately to 10 said box control levers and a jacquard mechanism, of a pattern chain for controlling the movement of said box lever actuating members, ,means for imparting an oscillatory movement of said pattern chain to cause the 55 operation of selectedbox levers, and means responsive to the indication of a filling change in the jacquard mechanism for advancing said pattern chain and thereby bringing about the operation of different box I?) levers.

ALBERT o. DUMAS.

CERTIFICATE OF CORRECTION.

Patent No. 1,915,271. June 27, 1933.

ALBERT O. DUMAS.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 1, line 36, for "operate" read "operation"; page 3, strike out lines 71 to 82 inclusive, comprising claim same page, lines 83, 98 and 115, and page 4, line 5, for the claim numbers "2, 3, 4 and 5" read "1, 2, 3 and 4" respectively; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 15th day of August, A. D. 1933.

M. .L- Moore.

(Seal) Acting Commissioner of Patents, 

